neurodsp.filt.utils.compute_transition_band¶
- neurodsp.filt.utils.compute_transition_band(f_db, db, low=- 20, high=- 3)[source]¶
Compute transition bandwidth of a filter.
- Parameters
- f_db1d array
Frequency vector corresponding to attenuation decibels, in Hz.
- db1d array
Degree of attenuation for each frequency specified in f_db, in dB.
- lowfloat, optional, default: -20
The lower limit that defines the transition band, in dB.
- highfloat, optional, default: -3
The upper limit that defines the transition band, in dB.
- Returns
- transition_bandfloat
The transition bandwidth of the filter, in Hz.
Examples
Compute the transition band of an FIR filter, using the computed frequency response:
>>> from neurodsp.filt.fir import design_fir_filter >>> filter_coefs = design_fir_filter(fs=500, pass_type='bandpass', f_range=(1, 25)) >>> f_db, db = compute_frequency_response(filter_coefs, 1, fs=500) >>> compute_transition_band(f_db, db, low=-20, high=-3) 0.5
Compute the transition band of an IIR filter, using the computed frequency response:
>>> from neurodsp.filt.iir import design_iir_filter >>> sos = design_iir_filter(fs=500, pass_type='bandstop', ... f_range=(10, 20), butterworth_order=7) >>> f_db, db = compute_frequency_response(sos, None, fs=500) >>> compute_transition_band(f_db, db, low=-20, high=-3) 2.0